AK-PC 781 Version 4.1x Menu operation RC8CE202 © Danfoss 03/2013 9
Compressor cap. % Cut-in compressor capacity in % (of total capacity)
Request Comp. Cap % Reference for compressor capacity (deviations may be due to time delays)
P0 °C Suction pressure in °C. (Measured with the pressure transmitter)
Ss Suction gas °C Actual suction gas temperature
Cond. ctrl. temp °C Actual temperature for control sensor (Pc or S7)
Cond. ctrl. ref. °C Actual reference temp. for condenser capacity
(incl. external contributions, if any)
Cond. cap. % Cut-in condenser capacity in % (of total capacity)
Request Cond. cap % Reference for condenser capacity
Pc Bar Condensing pressure (measured with the pressure transmitter)
Tc °C Condensing pressure in °C. (measured with the pressure transmitter)
Gc status Actual gas cooler operation:
0=O. 1=Standby. 2=Max COP operation. 3=Heat recovery. 4=Extra capacity.
5=Manual control.
Pgc Bar Actual gas cooler pressure
Pgc reference Bar Actual reference for gas cooler pressure
Sd discharge gas °C Actual discharge gas temperature
Sgc °C Actual temperature at outlet from the gas cooler
Tc max. limit °C Readout limit value for max condenser pressure
S7 brine temp °C Actual media temperature measured at S7 sensor
(Only used if S7 is selected as control sensor)
Condenser status 0: Power up Controller has been powered up (power supply re-connected)
1: Stopped Capacity control has been stopped (“Main switch” = OFF or
“Control mode” = OFF)
2: Manual Capacity is controlled manually (“Control mode” = MAN)
3: Alarm Capacity control is in alarm condition (f.ex. Pc Max or Sd Max)
4: Restart Capacity control is waiting for elapse of “Restart time”
5: Standby Capacity control is ready to start
6: Unloaded
7-9 Part loaded
10: Full loaded All capacity cutin
11: Running Capacity control is running
Air ow status 0: No RFG. select No refrigerant has been selected (monitoring of air
ow can not start)
1: Tuning Monitoring function adapts to the condenser in question
2: OFF Monitoring function is switched OFF
3: OK Air ow is OK
4: Little dirt The amount of dirt decreases the performance of the condenser,
clean when possible
5: Dirty The amount of dirt leads to considerable air ow problems, clean
as soon as possible
6: Blocking The amount of dirt might lead to high pressure problems, clean
now
Sc3 Air on °C Outdoor temperature in °C measured with Sc3 temperature sensor
No. of fans Dened number of fans
VSD Speed % Status of analogue output signal “AO” for variable speed drive (in percent of
full scale f.ex. 0 -10 V d.c.)
VSD safety Status of safety monitoring input for Variable Speed Drive
ON: Alarm on VSD A safety monitoring input
OFF: No alarm on VSD A safety monitoring input
Settings Main switch Main switch: ON: Regulation
OFF: Controller stopped
Condenser ctrl mode 0: MAN (The condenser capacity will be controlled manually)
1: OFF (The capacity control will be stopped)
2: AUTO (The capacity is controlled by the PI controller)
Manual capacity % Manual setting of condenser capacity
The value is in % of total capacity controlled by the controller
Pc Ref. mode 0: Set point Reference = “PcA setpoint °C”
1: Floating Reference is changed as a function of the outdoor temperature
measured by the “Sc3 air on” sensor, the set “Dimensioning tm K”
and the actual compressor load.
Cond. Setpoint °C Setting of required discharge pressure in °C
Dimensioning tm K Dimensioning mean temperature dierential between air- and condensing
temperature at full load for the condenser in question (Typical 8 – 15K).
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